From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37148C25B0C for ; Mon, 8 Aug 2022 01:53:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243394AbiHHBxA (ORCPT ); Sun, 7 Aug 2022 21:53:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243329AbiHHBuk (ORCPT ); Sun, 7 Aug 2022 21:50:40 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB18ACE3A; Sun, 7 Aug 2022 18:37:48 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 88BE060EA5; Mon, 8 Aug 2022 01:37:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D9FE6C433D7; Mon, 8 Aug 2022 01:37:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659922668; bh=tRMypaLnigkjeLRUmrWAejT49vT0wyzqMWkQO2IPZGc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FdmZcgGhFViNMtgicsuV4qxIseSgns7vYAYf5m6OKSEJRqUPJiD9JvjAIlISyuSSN Z4GBcdyuduKALBSOxtXh34IRJQCxejEzCDfut6J96ZVu42NK20oZVKjThp4Mm0CDQW MVAnyXf50CibZQOF6nP0CScfdL6+DoBAS6MOAXflIJh61yONA03wTBuyO+NKjB08/G wSrhNXUMHyqzM6pR40CEQmUBV3XscOo0LGl3L7wrdNQWfu76VEqbU75ZUuMlTtetD4 R6tgWtxFlF5moIGXvkmPCKB5NEm/3aG+Si80z7VFvK/H0fgNLmjgbg/KQ64zLGeiQa 1c8mLSc53XHCg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Francis Laniel , Will Deacon , Sasha Levin , catalin.marinas@arm.com, broonie@kernel.org, keescook@chromium.org, mark.rutland@arm.com, christophe.leroy@csgroup.eu, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.10 02/29] arm64: Do not forget syscall when starting a new thread. Date: Sun, 7 Aug 2022 21:37:12 -0400 Message-Id: <20220808013741.316026-2-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220808013741.316026-1-sashal@kernel.org> References: <20220808013741.316026-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Francis Laniel [ Upstream commit de6921856f99c11d3986c6702d851e1328d4f7f6 ] Enable tracing of the execve*() system calls with the syscalls:sys_exit_execve tracepoint by removing the call to forget_syscall() when starting a new thread and preserving the value of regs->syscallno across exec. Signed-off-by: Francis Laniel Link: https://lore.kernel.org/r/20220608162447.666494-2-flaniel@linux.microsoft.com Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/include/asm/processor.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index fce8cbecd6bc..7c546c3487c9 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -194,8 +194,9 @@ void tls_preserve_current_state(void); static inline void start_thread_common(struct pt_regs *regs, unsigned long pc) { + s32 previous_syscall = regs->syscallno; memset(regs, 0, sizeof(*regs)); - forget_syscall(regs); + regs->syscallno = previous_syscall; regs->pc = pc; if (system_uses_irq_prio_masking()) -- 2.35.1